Certifier belong to the 1st group. Certifier is a common french verb.
Certifier is conjugated the same way that verbs that end in : -ier
Certifier is conjugated with auxiliary avoir.
Certifier verb is
direct transitive. Certifier verb is a direct transitive verb, so passive voice can be used.
However, although the terminations are perfectly regular, stem can be irregular and have numerous variations.
Certifier is conjugated the same way that verbs that end in : -ier.
CERTIFIER : v. tr. Témoigner qu'une chose est vraie. Je vous certifie que cela est. Je puis vous le certifier. Copie certifiée conforme à l'original, ou simplement Certifié conforme.